SEL5
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 865
   NWS STORM PREDICTION CENTER NORMAN OK
   740 AM CST TUE NOV 15 2005
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          CENTRAL AND EASTERN ARKANSAS
          EXTREME SOUTHERN ILLINOIS
          WESTERN KENTUCKY
          SOUTHEAST MISSOURI
          NORTHERN MISSISSIPPI
          WESTERN TENNESSEE
   
   EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 740 AM UNTIL 500
   PM CST.
   
   ...THIS IS A PARTICULARLY DANGEROUS SITUATION...
   
   DESTRUCTIVE TORNADOES...LARGE HAIL TO 1.5 INCHES IN DIAMETER...
   THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE
   POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 120 STATUTE
   MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH NORTHEAST OF
   CAPE GIRARDEAU MISSOURI TO 35 MILES SOUTH SOUTHWEST OF GREENVILLE
   MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
   PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
   WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
   WARNINGS.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 864...
   
   DISCUSSION...A VERY MOIST/MODERATELY UNSTABLE WARM SECTOR IS PRESENT
   THIS MORNING ACROSS THE MS VALLEY.  THE ADDITION OF SURFACE HEATING
   SHOULD RESULT IN THE DEVELOPMENT OF DEEP CONVECTION ALONG SEVERAL
   SUBTLE BANDS WITHIN THE WARM SECTOR BY MID-LATE MORNING.  VERTICAL
   SHEAR WILL BECOME INCREASINGLY FAVORABLE FOR SUPERCELLS WITH
   POTENTIALLY DAMAGING TORNADOES BY MIDDAY AND INTO THE
   AFTERNOON...WITH THE ADDITIONAL THREAT FOR DAMAGING WINDS AND LARGE
   HAIL.  LATER THIS AFTERNOON...EXPECT A FRONTAL SQUALL LINE TO MOVE
   EWD ACROSS AR TOWARD THE MS RIVER...WITH THE THREAT FOR SIGNIFICANT
   WIND DAMAGE...TORNADOES...AND LARGE HAIL.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   450. MEAN STORM MOTION VECTOR 24040.
   
   
   ...THOMPSON